πŸ₯› Many proteins are enzymes


What are Enzymes?

Temperature

Inhibitors

pH

Substrate Concentration


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What are Enzymes?

Enzymes are proteins which catalyse (speed up) metabolic reactions. Like all other catalysts (e.g. in chemistry), enzymes achieve this by lowering the activation energy (energy needed for a reaction to occur) of a reaction, by forming an enzyme-substrate complex .

This can be described by the lock and key , and induced fit models of enzyme action. The lock and key model is based on complementary shapes between the enzyme and substrate. The substrate fits into the enzyme.

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The induced fit model: (the enzyme changes shape to β€œhug” the substrate)

The enzyme’s shape is not exactly matched to the substrate, but it is able to accommodate the substrate with a close enough shape into an enzyme-substrate complex and carry out catalysing that reaction.

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